Make the automatic-login-check optional, per a config setting in ProcessWireUpgradeCheck module. Note that the default is now OFF, so must be enabled if you want that feature.

Author: ryancramerdesign

ProcessWireUpgrade.module

@@ -21,7 +21,7 @@ class ProcessWireUpgrade extends Process {
 		return array(
 			'title' => 'Upgrades', 
 			'summary' => 'Tool that helps you identify and install core and module upgrades.', 
-			'version' => 2, 
+			'version' => 3, 
 			'author' => 'Ryan Cramer', 
 			'installs' => 'ProcessWireUpgradeCheck', 
 			'icon' => 'coffee'

ProcessWireUpgradeCheck.config.php

@@ -0,0 +1,21 @@
+<?php
+
+class ProcessWireUpgradeCheckConfig extends ModuleConfig {
+	public function __construct() {
+		$this->add(array(
+			array(
+				'name' => 'useLoginHook',
+				'type' => 'radios', 
+				'label' => $this->_('Check for upgrades on superuser login?'),
+				'description' => $this->_('If "No" is selected, then upgrades will only be checked manually when you click to Setup > Upgrades.'), 
+				'notes' => $this->_('Automatic upgrade check requires ProcessWire 2.5.20 or newer.'), 
+				'options' => array(
+					1 => $this->_('Yes'), 
+					0 => $this->_('No')
+				),
+				'optionColumns' => 1, 
+				'value' => 0
+			)
+		));
+	}
+}

ProcessWireUpgradeCheck.module

@@ -23,7 +23,7 @@ class ProcessWireUpgradeCheck extends WireData implements Module {
 		return array(
 			'title' => 'Upgrades Checker', 
 			'summary' => 'Automatically checks for core and installed module upgrades at routine intervals.', 
-			'version' => 3, 
+			'version' => 4, 
 			'autoload' => "template=admin", 
 			'singular' => true, 
 			'author' => 'Ryan Cramer', 
@@ -35,12 +35,18 @@ class ProcessWireUpgradeCheck extends WireData implements Module {
 	const versionURL = 'https://raw.githubusercontent.com/ryancramerdesign/ProcessWire/{branch}/wire/core/ProcessWire.php'; 
 	const zipURL = 'https://github.com/ryancramerdesign/ProcessWire/archive/{branch}.zip';
 
+	public function __construct() {
+		$this->set('useLoginHook', 1); 
+	}
+
 	/**
 	 * Initialize and perform access checks
 	 *
 	 */
 	public function init() {
-		$this->session->addHookAfter('login', $this, 'loginHook'); 
+		if($this->useLoginHook) {
+			$this->session->addHookAfter('login', $this, 'loginHook'); 
+		}
 	}
 
 	/**
@@ -337,7 +343,5 @@ class ProcessWireUpgradeCheck extends WireData implements Module {
 		if(count($newerBranches > 1)) ksort($newerBranches); 
 		return $newerBranches; 
 	}
-
-
 }
 

README.md

@@ -27,7 +27,7 @@ reason, you can manually restore from the backups should you
 need to. 
 
 If your ProcessWire version is new enough to have the 
-WireDatabaseBackup class (PW 2.4.14+) then this module will
+WireDatabaseBackup class (PW 2.5.14+) then this module will
 also give you the option of backing up your database. 
 
 
@@ -48,6 +48,7 @@ environments before using in production environments.
 ## Requirements
 
 - ProcessWire 2.3.4 or newer (for core upgrade capability)
-- ProcessWIre 2.5.0 or newer (for auto-upgrade notifications)
+- ProcessWire 2.5.0 or newer (for module upgrade capability)
+- ProcessWire 2.5.20 or newer (for automatic upgrade checks)